info on exterior insulation/filling material, etc.-1999

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Report A3132.1 Page 15 The current report presents the 2-D analysis results, reported in terms of thermal resistance relative to an initial condition Details of the 3-dimensional analysis are published in a separate document4. Physical Observations during Removal of Specimens The 10 EPS specimens tested during the EIBS project were removed from the soil on Jun 23t 1998. Appendix E records observations made during removal. In general, the specimens appeared to be in good condition. The protected portions of the insulation (protected by cementitious board) showed no signs of sedimentation (soil deposition at the surface), nor did the majority of the surface of the specimens in contact with the concrete. Sedimentation was visible but limited for the most part to portions of the insulation directly in contact with the ground, and at the lowest level, about 100 mm above the footing. - Lab Measured Properties after Exposure Appendix F records the changes in thermal, mechanical and vapour diffusion properties of the specimens after exposure. As well, moisture contents of the specimens are reported. Table 4 summarizes the average thermal resistance of the insulating materials tested initially and after removal from the Test Hut wall. Table 4. Average Thermal Resistance of the Insulation Tested Before and After Exposure at the Test Hut (m2 C/W at 25.4 mm thickness) Type Initial Post-exposure Difference m2 CNV m2 C/W % @ 25.4 mm @ 25.4 mm EPS Type "A" 0.604 0.605 <1% EPS Type "B° 0.680 0.683 <1% EPS Type "C" 0.710 0.711 <1% Note: all results normalized to 25.4 mm thickness using the DI PAC model . 'The DIPAC model, used to calculate thermal conductivity of cellular plastics as a function of their polymeric composition, blowing agents (if used instead of air), aging period as well as the specimen ,temperature and thickness has been experimentally verified. For details consult:Bomberg,M.T.; Kumaran,M.K. "Roofing exposure of cellular plastics manufactured with alternative blowing agents to verify methods for predicting their long-term thermal performance"ASTM Special Technical Publication pp. 1- 25.(NRCC-36898)(IRC-P-3444) In general, the results confirmed that there is no significant change in any of the measured properties—thermal resistance, compressive strength, and water vapour permeability. The measured moisture contents of the excavated EPS specimens were low.